1、 IEC TS 60079-40 Edition 1.0 2015-02 TECHNICAL SPECIFICATION Explosive atmospheres Part 40:Requirements for process sealing between flammable process fluids and electrical sy stems IEC TS 60079-40:2015-02(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC,Geneva,Switzerland All rights res
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11、process fluids and electrical sy stems INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.260.20 ISBN 978-2-8322-2248-5 Registered trademark of the International Electrotechnical Commission Warning!Make sure that y ou obtained this publication from an authorized distributor.2 IEC TS 60079-40:2015 IEC
12、2015 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 General requirements.8 4.1 Basis for requirements.8 4.2 Single process seal equipment.9 4.3 Dual process seal equipment.9 4.4 Equipment with limited pressure at the electrical connections.9 4.5 Purged or pressuri
13、zed equipment.9 4.6 Add-on secondary process seals.9 4.7 Annunciators.10 5 Type verifications and tests.10 5.1 Test sample.10 5.2 Single process seal equipment.10 5.2.1 Order of conditioning.10 5.2.2 Temperature cycling.10 5.2.3 Pressure cycling.11 5.2.4 Leakage test.12 5.2.5 Burst pressure test.12
14、5.3 Dual process seal equipment.12 5.3.1 Primary process seal leakage test.12 5.3.2 Primary process seal burst pressure test.12 5.3.3 Venting pressure determination.12 5.3.4 Verification of annunciation effectiveness.13 5.3.5 Secondary process seal leakage test.13 5.4 Verification of limited pressur
15、e effectiveness.13 6 Marking.13 7 Instructions.13 Annex A(informative)Conditioning and test flowchart.15 Bibliography.17 Figure 1 Equipment process sealing components.6 Figure 2 Examples of add-on secondary process seals.8 Figure 3 Temperature cycle conditioning profile.11 Figure A.1 Conditioning an
16、d test flowchart.16 Table 1 Leakage test pressures.12 Table 2 Burst test pressures.12 IEC TS 60079-40:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ EXPLOSIVE ATMOSPHERES Part 40:Requirements for process sealing between flammable process fluids and electrical systems FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical committees(IEC National Committees).The object of IEC is to promote i
